masqmail error

hi,
after a system upgrade, I'm no more able to send mails with masqmail.
my masqmail.conf contains lines like
online_routes.gmail_gmail = "/etc/masqmail/gmail_gmail.route"
Nevetheless, I get error messages like this one:
var 'online_routes.gmail_gmail' not (yet) known, ignored
has anybody an idea on how to fix that?
best regards,
--
Pierre Frenkiel